Emerson unidrive m200 - At Frequency Lower Limit;At Frequency Upper Limit; Over Frequency Threshold; Absolute at Frequency Select; Hard Frequency Reference;Hard Frequency Reference Select;Position

Parameter 03.006 At Frequency Lower Limit
Short description Defines the lower limit for detecting the at frequency condition
Mode Open‑loop
Minimum 0.00 Maximum 550.00
Default 1.00 Units Hz
Type 32 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 2
Coding RW
AtFrequency (10.006) is set if the PostRampReference (02.001) is on the boundaries or within the at speed window. AboveSetFrequency (10.007) and BelowSetFrequency (10.005) are set if the
reference is above or below the window respectively.
If AbsoluteAtFrequencySelect (03.009) = 0 reference window mode is used.
The "at speed" condition is true if,
(|Pre-rampReference (01.003)| - AtFrequencyLowerLimit (03.006)) ≤ |PostRampReference (02.001)| ≤ (|Pre-rampReference (01.003)| + AtFrequencyUpperLimit (03.007))
(If the lower limit is less than zero then zero is used as the lower limit.)
If AbsoluteAtFrequencySelect (03.009) = 1 absolute window mode is used.
The "at speed" condition is true if,
AtFrequencyLowerLimit (03.006) ≤ |PostRampReference (02.001)| ≤ AtFrequencyUpperLimit (03.007)
Note: All flags are cleared if ReferenceOn (01.011) is 0.
Parameter 03.007 At Frequency Upper Limit
Short description Defines the upper limit for detecting the at frequency condition
Mode Open‑loop
Minimum 0.00 Maximum 550.00
Default 1.00 Units Hz
Type 32 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 2
Coding RW
See AtFrequencyLowerLimit (03.006).
Parameter 03.008 Over Frequency Threshold
Short description Defines the threshold used to detect the over frequency condition
Mode Open‑loop
Minimum 0.00 Maximum 550.00
Default 0.00 Units Hz
Type 32 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 2
Coding RW
If OverFrequencyThreshold (03.008) is set to a non-zero value it defines the over frequency threshold. If the PostRampReference (02.001) exceeds this threshold in either direction an OverSpeed trip
is produced. If OverFrequencyThreshold (03.008) is set to 0.00 the threshold is 1.2 times the variable maximum for the references which is normally the value of MaximumSpeed (01.006) or
M2MaximumSpeed (21.001), but see VM_SPEED_FREQ_REF[MAX] for a full definition.
Parameter 03.009 Absolute At Frequency Select
Short description Set to 1 to select absolute at frequency
Mode Open‑loop
Minimum 0 Maximum 1
Default 0 Units
Type 1 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW
See AtFrequencyLowerLimit (03.006).
Parameter 03.022 Hard Frequency Reference
Short description Defines the value of the hard frequency reference
Mode Open‑loop
Minimum −VM_SPEED_FREQ_REF Maximum VM_SPEED_FREQ_REF
Default 0.00 Units Hz
Type 32 Bit User Save Update Rate 4ms
Display Format Standard Decimal Places 2
Coding RW, VM
The HardFrequencyReference (03.022) is a reference value which does not pass through the ramp system, but is added directly to the PostRampReference (02.001). The HardFrequencyReference
(03.022) is only added when selected by the HardFrequencyReferenceSelect (03.023) and ReferenceOn (01.011) is active.
Parameter 03.023 Hard Frequency Reference Select
Short description Set to 1 to enable the use of the hard frequency reference
Mode Open‑loop
Minimum 0 Maximum 1
Default 0 Units
Type 1 Bit User Save Update Rate 4ms
Display Format Standard Decimal Places 0
Coding RW
See HardFrequencyReference (03.022).
Parameter 03.029 Position
Short description Displays the position counter in frequency or encoder mode
Mode Open‑loop
Minimum 0 Maximum 65535
Default Units
Type 16 Bit Power Down Save Update Rate Background
Display Format Standard Decimal Places 0
Coding RO, FI, ND, NC, PT, BU
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Unidrive M200 Parameter Reference Guide
Issue: 01.05.00.10